CN204855722U - Insulating tubular busbar partial discharge detector system of 10kV - Google Patents
Insulating tubular busbar partial discharge detector system of 10kV Download PDFInfo
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- CN204855722U CN204855722U CN201520551676.XU CN201520551676U CN204855722U CN 204855722 U CN204855722 U CN 204855722U CN 201520551676 U CN201520551676 U CN 201520551676U CN 204855722 U CN204855722 U CN 204855722U
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Abstract
The utility model relates to an insulating tubular busbar partial discharge detector system of 10kV, its technical characterstic is: show the ware including electric capacity type sensor, ultrasonic sensor, synchronous voltage signal pickup apparatus, filter amplifier device, main control system and touch screen display, two metal foil electrodes of electric capacity type sensor are attached in the both sides of awaiting measuring insulating tubular busbar respectively to detect the impedance phase with the differential circuit and be connected constitution difference formula detection loop, output that the differential circuit detected impedance, ultrasonic sensor, synchronous voltage signal pickup apparatus is connected with capacitor filter amplification device, ultrasonic wave filtering amplification device, voltage filtering amplification device's input respectively, the output of above -mentioned three filter amplifier device all is connected with the main control system, the main control system shows with touch screen display that the ware is connected. The utility model discloses integrated a plurality of sensors can detect insulating tubular busbar's partial discharge type and the degree of discharging quick, accurately, and portable.
Description
Technical field
The utility model belongs to substation bus bar Partial Discharge Detecting Technology field, particularly a kind of 10kV insulating tube type busbar partial discharge detecting system.
Background technology
Along with insulating tube type busbar application increasingly extensive, the research of its detection technique just shows important.Along with the development of China's urban construction and the increase of power consumption, substation capacity is also improving constantly, and the situation that more than 110kV grade transformer substation 10kV outgoing line side rated current is greater than 2500A is very common.Therefore the current-carrying capacity of substation bus bar, physical strength and insulating property are had higher requirement.Compared with traditional rectangular bus bar, insulating tube type busbar kelvin effect is weak, and under identical current-carrying capacity, current density improves about 30%, and tube type bus module of anti-bending section is 5 times of rectangular bus bar.Therefore, compared with rectangular bus bar, insulating tube type busbar more can meet the requirement of power network development, and is widely used in 0.4 ~ 220kV transformer station.
But in use, also there are some therefore potential safety hazard in insulating tube type busbar.The trend continuing to increase is shown according to investigation in recent years.Insulating tube type busbar most common failure type has: (1) insulating tube type busbar terminal and equipment connection place seriously generate heat; (2) bus insulation punctures; (3) intermediate head insulation breakdown; (4) insulating tube type busbar terminating insulation punctures;
Its main cause is following two aspects: the technological level in institute of (1) isolated bus manufacturing enterprise product sold quality and installation process is uneven, there is impurity, micropore, semi-conductive layer projection or lamination defect in insulation course inside, all may cause the generation of shelf depreciation, shelf depreciation develops into electricity tree through accumulation, cause puncturing of major insulation the most at last, affect the reliability of network system.(2) isolated bus intermediate head complex structure, the factor therefore affecting its insulating property is a lot, and the bad technique in usual manual manufacture process at the scene easily leaves over potential faults, causes the generation of shelf depreciation.
If isolated bus band defect is run, when generator and transformer low voltage side bus break down, will differential protection be started, and make generator and transformer tripping operation, affect the operation of whole electricity generating and supplying system.
Current scene has relevant standard and the detection method of relative maturity for the Partial Discharge Detection of XLPE cable and oil-filled cable, electric discharge type roughly comprises internal discharge, creeping discharge and corona discharge etc., and the state estimation of cable totally has more ripe standard criterion.But not yet carry out for the Partial Discharge Detection research of insulating tube type busbar and work on the spot.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of reasonable in design, shelf depreciation type and degree of discharge that can detect insulating tube type busbar fast, accurately, and is easy to carry.The utility model solves its technical matters and takes following technical scheme to realize:
A kind of 10kV insulating tube type busbar partial discharge detecting system, comprising: capacitance type transducers, ultrasonic sensor, synchronous voltage signal pick device, capacitor filtering multiplying arrangement, ultrasound wave filter and amplification device, voltage filter multiplying arrangement, main control system and touch-screen display; Two metal foil electrodes of described capacitance type transducers are attached to the both sides of insulating tube type busbar to be measured respectively, and detect impedance with difference channel and be connected to form differential type measure loop; The output terminal of described difference channel detection impedance, ultrasonic sensor, synchronous voltage signal pick device is connected with the input end of capacitor filtering multiplying arrangement, ultrasound wave filter and amplification device, voltage filter multiplying arrangement respectively; The output terminal of described capacitor filtering multiplying arrangement, ultrasound wave filter and amplification device, voltage filter multiplying arrangement is all connected with main control system, and described main control system is connected with touch-screen display.
And, described main control system comprises: high-speed data acquisition card and coupled Analysis of Partial Discharge control module, and described capacitor filtering multiplying arrangement, ultrasound wave filter and amplification device, the output terminal of voltage filter multiplying arrangement are connected with the input end of high-speed data acquisition card.
And the permanent magnet that the built-in annular of described ultrasonic sensor is laid, is adsorbed on the metal frame of neighbouring ground connection of insulating tube type busbar to be measured, the center operating frequency of ultrasonic sensor is 40kHz.
And described synchronous voltage signal pick device is connected on the corresponding ground wire of insulating tube type busbar to be measured.
And described high-speed data acquisition card adopts 4 passage pci interface capture cards, the highest employing rate 40M of each passage, resolution 14, entrance potential range 5V.
And the passband of the bandpass filter of described capacitor filtering multiplying arrangement, ultrasound wave filter and amplification device, voltage filter multiplying arrangement is 1MHz-10MHz, and amplifier gain is 40dB.
Advantage of the present utility model and good effect are:
1, the utility model is based on ultrasound wave and capacitive coupling Cleaning Principle, by the insulating tube type busbar local discharge signal that capacitance type transducers, sonac, synchronous voltage signal pick device gather, carry out signal denoising via filter and amplification device and amplify process; The local discharge signal collection gathered by multiple sensor by high-speed data acquisition card is to main control system, put analysis electric control unit by the local in main control system and carry out feature extraction and pattern-recognition, differentiate type and the degree of shelf depreciation, for the safe handling of insulating tube type busbar provides reference.
2, main control system of the present utility model realizes local discharge signal PRPD spectrum analysis by Analysis of Partial Discharge control module, A/B/C three-phase local discharge signal is analyzed and display, electric discharge N-Q figure, discharge signal equivalence time frequency analysis, shelf depreciation type diagnostic, A/B/C three-phase on-line monitoring shows, and adds the function such as database and historical data management to.The touch display screen be connected with main control system, man-machine interface is friendly, and information displaying is directly perceived, and simple operation, can provide abundant decision information for technician, and integrated apparatus is convenient to mobile, facilitates the operation of staff to use.
Accompanying drawing explanation
Fig. 1 is system architecture schematic diagram of the present utility model;
Fig. 2 is schematic block circuit diagram of the present utility model
Embodiment
Below in conjunction with accompanying drawing, the utility model embodiment is described in further detail:
A kind of 10kV insulating tube type busbar partial discharge detecting system, as shown in Figures 1 and 2, comprise: capacitance type transducers 1, ultrasonic sensor 3, synchronous voltage signal pick device 4, capacitor filtering multiplying arrangement, ultrasound wave filter and amplification device, voltage filter multiplying arrangement, main control system and touch-screen display, described main control system comprises: high-speed data acquisition card and coupled Analysis of Partial Discharge control module; Two metal foil electrodes of described capacitance type transducers are attached to the both sides of insulating tube type busbar 2 to be measured respectively, and detect impedance with difference channel and be connected to form differential type measure loop; The output terminal of described difference channel detection impedance, ultrasonic sensor, synchronous voltage signal pick device is connected with the input end of capacitor filtering multiplying arrangement, ultrasound wave filter and amplification device, voltage filter multiplying arrangement respectively; The output terminal of described capacitor filtering multiplying arrangement, ultrasound wave filter and amplification device, voltage filter multiplying arrangement is all connected with the high-speed data acquisition card in main control system, and described main control system is connected with touch-screen display.Below various piece in system is described:
1, capacitance type transducers is attached to insulating tube type busbar testing sample both sides by two metal foil electrodes, and by forming the equivalent capacity of nF level between insulating tube type busbar outer protective sleeve and earthing, both sides metal foil electrode and difference channel detect impedance and are connected to form differential type measure loop.When producing shelf depreciation in tube type bus, after being transmitted to two metal foil electrodes, the signal of formation is offset in detection impedance; When intermediate head place produces shelf depreciation, the pulse current formed by two coupling capacitance loops produces pressure drop in detection impedance place, can measure in subsequent conditioning circuit.Capacitance type transducers and detect impedance with difference channel and be connected to form differential type measure loop, for picking up local discharge signal.
2, the permanent magnet that lays of the built-in annular of ultrasonic sensor, be adsorbed on the metal frame of neighbouring ground connection of tested insulating tube type busbar, have electrical isolation characteristic, the center operating frequency of ultrasonic sensor is 40kHz.For picking up the ultrasonic signal of shelf depreciation.
3, the built-in voltage divider of synchronous voltage signal pick device, for picking up operating voltage waveform, provides the reference phase signal of shelf depreciation.
4, the passband of the bandpass filter of capacitor filtering multiplying arrangement, ultrasound wave filter and amplification device, voltage filter multiplying arrangement is 1MHz-10MHz, and amplifier gain is 40dB, and the frequency-selecting for squelch and useful signal is amplified.
5, high-speed data acquisition card adopts 4 passage pci interface capture cards, the highest employing rate 40M of single channel, resolution 14, and entrance potential range 5V, for high speed acquisition local discharge signal, realizes analog-digital conversion function.
6, Analysis of Partial Discharge control module: based on LabVIEW platform exploitation, be mainly used in carrying out feature extraction and pattern-recognition, differentiates type and the degree of shelf depreciation, for the safe handling of insulating tube type busbar provides reference.Local discharge signal PRPD spectrum analysis can be realized, A/B/C three-phase Partial discharge signal is analyzed and display, electric discharge N-Q figure, discharge signal equivalence time frequency analysis, type diagnostic is put in office, A/B/C three-phase on-line monitoring shows, add the function such as database and historical data management to, have friendly interface, information displaying is directly perceived, the features such as simple operation, for technician provides abundant decision information.
7, main control system: based on principle of pc exploitation, for detecting the subsequent treatment of data, the operation of Analysis of Partial Discharge control module and data base administration.
8, touch-screen display: adopt capacitive touch screen design, man-machine interface is succinctly attractive in appearance, is easy to operation, for equipment operating and software application.
The utility model is set up based on ultrasound wave and capacitive coupling principle.In the production of insulating tube type busbar, transport and installation process, defect may be introduced in insulation.Under External Electrical Field, defect produces partial discharge phenomenon, and outwards discharges with high frequency electrical signal and ultrasound modalities, by preparing corresponding capacitor type and ultrasonic sensor, can pick up local discharge signal.Capacitive coupled sensors working band of the present utility model is high, highly sensitive; Sonac center operating frequency is 40kHz; By filter and amplification device to the local discharge signal that multiple sensor picks up carry out squelch and useful signal frequency-selecting amplify after, the shelf depreciation simulating signal after filter amplifying processing is converted to digital signal acquiring to Analysis of Partial Discharge control module by the high-speed data acquisition card in main control system, feature extraction and pattern-recognition is carried out by Analysis of Partial Discharge control module, differentiate type and the degree of shelf depreciation, for the safe handling of insulating tube type busbar provides reference.
It is emphasized that; embodiment described in the utility model is illustrative; instead of it is determinate; therefore the utility model comprises the embodiment be not limited to described in embodiment; every other embodiments drawn according to the technical solution of the utility model by those skilled in the art, belong to the scope of the utility model protection equally.
Claims (6)
1. a 10kV insulating tube type busbar partial discharge detecting system, is characterized in that: comprise capacitance type transducers, ultrasonic sensor, synchronous voltage signal pick device, capacitor filtering multiplying arrangement, ultrasound wave filter and amplification device, voltage filter multiplying arrangement, main control system and touch-screen display; Two metal foil electrodes of described capacitance type transducers are attached to the both sides of insulating tube type busbar to be measured respectively, and detect impedance with difference channel and be connected to form differential type measure loop; The output terminal of described difference channel detection impedance, ultrasonic sensor, synchronous voltage signal pick device is connected with the input end of capacitor filtering multiplying arrangement, ultrasound wave filter and amplification device, voltage filter multiplying arrangement respectively; The output terminal of described capacitor filtering multiplying arrangement, ultrasound wave filter and amplification device, voltage filter multiplying arrangement is all connected with main control system, and described main control system is connected with touch-screen display.
2. a kind of 10kV insulating tube type busbar partial discharge detecting system according to claim 1, it is characterized in that: described main control system comprises: high-speed data acquisition card and coupled Analysis of Partial Discharge control module, described capacitor filtering multiplying arrangement, ultrasound wave filter and amplification device, the output terminal of voltage filter multiplying arrangement are connected with the input end of high-speed data acquisition card.
3. a kind of 10kV insulating tube type busbar partial discharge detecting system according to claim 1, it is characterized in that: the permanent magnet that the built-in annular of described ultrasonic sensor is laid, be adsorbed on the metal frame of the neighbouring ground connection of pipe typed insulation bus to be measured, the center operating frequency of ultrasonic sensor is 40kHz.
4. a kind of 10kV insulating tube type busbar partial discharge detecting system according to claim 1, is characterized in that: described synchronous voltage signal pick device is connected on the corresponding ground wire of pipe typed insulation bus to be measured.
5. a kind of 10kV insulating tube type busbar partial discharge detecting system according to claim 1, it is characterized in that: described high-speed data acquisition card adopts 4 passage pci interface capture cards, the highest employing rate 40M of each passage, resolution 14, entrance potential range 5V.
6. a kind of 10kV insulating tube type busbar partial discharge detecting system according to claim 1, it is characterized in that: the passband of the bandpass filter of described capacitor filtering multiplying arrangement, ultrasound wave filter and amplification device, voltage filter multiplying arrangement is 1MHz-10MHz, and amplifier gain is 40dB.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520551676.XU CN204855722U (en) | 2015-07-27 | 2015-07-27 | Insulating tubular busbar partial discharge detector system of 10kV |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520551676.XU CN204855722U (en) | 2015-07-27 | 2015-07-27 | Insulating tubular busbar partial discharge detector system of 10kV |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105629145A (en) * | 2016-03-31 | 2016-06-01 | 国网天津市电力公司 | 10KV insulation tube bus ultrahigh frequency partial discharge detection device |
| CN106249112A (en) * | 2016-08-04 | 2016-12-21 | 国网天津市电力公司 | 10kV insulating tube type busbar transition joint partial discharge detecting system |
| CN107121623A (en) * | 2017-04-19 | 2017-09-01 | 天津市电力科技发展有限公司 | A kind of insulating tube type busbar partial discharge monitoring system |
| CN110412418A (en) * | 2019-07-22 | 2019-11-05 | 国网湖北省电力有限公司电力科学研究院 | Insulating tube type busbar insulation diagnosis and localization method based on earth current measurement |
| CN113866621A (en) * | 2021-09-26 | 2021-12-31 | 广东电网有限责任公司 | Partial discharge signal detection system of high-voltage switch cabinet |
-
2015
- 2015-07-27 CN CN201520551676.XU patent/CN204855722U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105629145A (en) * | 2016-03-31 | 2016-06-01 | 国网天津市电力公司 | 10KV insulation tube bus ultrahigh frequency partial discharge detection device |
| CN106249112A (en) * | 2016-08-04 | 2016-12-21 | 国网天津市电力公司 | 10kV insulating tube type busbar transition joint partial discharge detecting system |
| CN107121623A (en) * | 2017-04-19 | 2017-09-01 | 天津市电力科技发展有限公司 | A kind of insulating tube type busbar partial discharge monitoring system |
| CN110412418A (en) * | 2019-07-22 | 2019-11-05 | 国网湖北省电力有限公司电力科学研究院 | Insulating tube type busbar insulation diagnosis and localization method based on earth current measurement |
| CN113866621A (en) * | 2021-09-26 | 2021-12-31 | 广东电网有限责任公司 | Partial discharge signal detection system of high-voltage switch cabinet |
| CN113866621B (en) * | 2021-09-26 | 2023-06-13 | 广东电网有限责任公司 | Partial discharge signal detection system of high-voltage switch cabinet |
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